Thanks, I'm trying to make this about as comprehensive as I can. Just looking at ebay listing photos it's very difficult to notice all the variations between Combinas. I was surprised to find out that there are dozens of differences between my two, and I think the later version is decidedly better.

Pictures can be so deceptive! It's mostly down to small details. There's corrosion spots on the metal and little defects in the paint and a few little plastic pieces broken off. Although this one isn't as used as the 1957 one.